stack

The workflow-level stack field sets the default Atmos stack applied to every type: atmos step in the workflow.

workflows:
  deploy-vpc:
    stack: tenant1-ue2-dev
    steps:
      - command: terraform plan vpc
      - command: terraform apply vpc -auto-approve

Precedence

Stack values are resolved from lowest to highest priority:

1. Stack flags embedded in the step command.
2. Workflow-level stack.
3. Step-level stack.
4. The command-line --stack flag.

Prefer reusable workflows that omit stack and receive it from the command line when the same workflow should run across environments.